Starting April 29, 2025, Gemini 1.5 Pro and Gemini 1.5 Flash models are not available in projects that have no prior usage of these models, including new projects. For details, see Model versions and lifecycle.
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Vertex AI in express mode lets you try a subset of Vertex AI features
by using only an express mode API key. This page shows you the REST resources
available for Vertex AI in express mode.
Unlike the standard REST resource endpoints on Google Cloud, endpoints that are
available when using Vertex AI in express mode use the global endpoint
aiplatform.googleapis.com and don't include projects or locations. For
example, the following shows the difference between standard and express mode
endpoints for the datasets resource:
Standard Vertex AI endpoint format: https://{location}-aiplatform.googleapis.com/v1/projects/{project}/locations/{location}/{model}:generateContent
Endpoint format for Vertex AI in express mode: https://aiplatform.googleapis.com/v1/{model}:generateContent
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[],[],null,["# Vertex AI in express mode REST API reference\n\n| **Preview**\n|\n|\n| This feature is subject to the \"Pre-GA Offerings Terms\" in the General Service Terms section\n| of the [Service Specific Terms](/terms/service-terms#1).\n|\n| Pre-GA features are available \"as is\" and might have limited support.\n|\n| For more information, see the\n| [launch stage descriptions](/products#product-launch-stages).\n\nVertex AI in express mode lets you try a subset of Vertex AI features\nby using only an express mode API key. This page shows you the REST resources\navailable for Vertex AI in express mode.\n\nUnlike the standard REST resource endpoints on Google Cloud, endpoints that are\navailable when using Vertex AI in express mode use the global endpoint\n`aiplatform.googleapis.com` and don't include `projects` or `locations`. For\nexample, the following shows the difference between standard and express mode\nendpoints for the datasets resource:\n\n**Standard Vertex AI endpoint format** : `https://{location}-aiplatform.googleapis.com/v1/projects/{project}/locations/{location}/{model}:generateContent`\n\n**Endpoint format for Vertex AI in express mode** : `https://aiplatform.googleapis.com/v1/{model}:generateContent`\n\nREST Resource: [v1.publishers.models](/vertex-ai/generative-ai/docs/reference/express-mode/rest/v1/publishers.models)\n---------------------------------------------------------------------------------------------------------------------\n\nREST Resource: [v1beta1.publishers.models](/vertex-ai/generative-ai/docs/reference/express-mode/rest/v1beta1/publishers.models)\n-------------------------------------------------------------------------------------------------------------------------------"]]